Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7e0866deba7fbf…

MALICIOUS

PDF

72.4 KB Created: 2021-04-07 00:35:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8e63855eab28304c98d8ab6b827b40ac SHA-1: 20b71c31eeaceee76315a571461ecef08b5438e5 SHA-256: ed7e0866deba7fbfdcad6ccb144c7469437e4937ca374e6e1fd9657807d3a57d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further payloads or phishing. No scripts were extracted, but the PDF structure itself is used to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/award?keyword=fluvial+geomorphology+book+pdf PDF link annotation
    • https://cdn.sqhk.co/pelonulu/jbjcDif/fivuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/fAxidge/tumblr_blade_runner_2049.pdfIn PDF document text
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/e0be269c7d.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/free_diablo_2_classic_cd_keys.txt.pdfIn PDF document text
    • https://dawirusopu.weebly.com/uploads/1/3/2/3/132303146/7485c152f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_6064dc0f8e08f.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/80308261832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460231/normal_605ce808f1353.pdfIn PDF document text
    • https://pugewolusaw.weebly.com/uploads/1/3/1/4/131453132/e1be3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_605238439928d.pdfIn PDF document text
    • https://nanavefog.weebly.com/uploads/1/3/0/7/130775134/7089993.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/gvhbgiL/twisted_wonderland_azul_nsfw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_606779c07f7fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5fdebd148e23f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458826/normal_604af5d98671f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_6014d7ee08f37.pdfIn PDF document text
    • http://samokex.sportsontheweb.net/audi_a3_price_list_2020.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/material_safety_data_sheet_example.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/Quwhbgh/11299224251.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sabegokek/open_paint_in_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/gymshark_size_guide_womens.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/replace_with_new_imaging_unit_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/sample_company_profile_format_for_travel_agency.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/19680424253.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC6 5596 bytes
SHA-256: 2e99327f5844d08fa21ddb28929568c36a3672848e31ce8cdd023467c37beb19
font_01_sfnt_off0000f1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 10172 bytes
SHA-256: c43c86ae5412cdd5fcc6333ebbea812930f845587b9059c8521f608e3e4bfc91

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